Methods and apparatuses for transmission scheduling on multiple frequencies

Patent metadata

Field	Value
Publication number	US-11039458-B2
Application number	US-201715820342-A
Country	US
Kind code	B2
Filing date	Nov 21, 2017
Priority date	Nov 21, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A method, apparatus, and computer-readable medium at a transmitting user equipment (UE) in a distributed cellular vehicle-to-everything environment are disclosed to determine a schedule for transmissions on subchannels of multiple frequencies based on a set of UE-specific, dynamic, and performance related metrics or criteria. The metrics may include an estimated number of users on a subchannel, a best-bandwidth fit, channel loading conditions, transmission range, and quality requirements of an application, among others. Such a schedule for transmissions on subchannels of multiple frequencies may result in either an improved capacity utilization, an improved communication quality, or both.

First claim

What is claimed:

1. A method of wireless communication by a user equipment (UE), comprising:
determining a number of users on each of one or more subchannels based in part on one or more of: a received demodulation reference signal, a received power during a predetermined time period, and a number of packets successfully decoded;
determining by the UE a multi-frequency transmission schedule based at least in part on the determined number of users on the subchannel, wherein determining the multi-frequency transmission schedule comprises assigning the one or more subchannels of multiple transmission frequencies of different wireless technologies to the UE in such a way that results in a reduced number of fragmentations of a transport block of data for communications with at least one other UE in a distributed vehicle-to-everything (V2X) environment;
transmitting by the UE the multi-frequency transmission schedule directly to the at least one other UE; and
transmitting by the UE the transport block of data based on the multi-frequency transmission schedule.

2. The method of claim 1 , wherein determining the multi-frequency transmission schedule comprises selecting at least one subchannel of one frequency for transmission of at least one transport block of data and the multi-frequency transmission schedule is a semi-persistent schedule or an event-driven schedule.

3. The method of claim 1 , further comprising at least one of:
monitoring traffic of the at least one other UE in the distributed V2X environment;
updating the multi-frequency transmission schedule based in part on one or more of: an event, a timer, and a triggering condition that the number of users exceeds a predetermined threshold; and
transmitting the updated multi-frequency transmission schedule to the at least one UE in the distributed V2X environment.

4. The method of claim 1 , wherein determining the multi-frequency transmission schedule comprises selecting a subchannel of a transmission frequency based on one or more propagation characteristics of the transmission frequency, the characteristics comprising a range and transmission quality of the subchannel of transmission frequency.

5. The method of claim 1 , wherein determining the multi-frequency transmission schedule comprises selecting a subchannels appropriate for a presence of multiple concurrent transmissions and a baseband restriction.

6. The method of claim 1 , wherein determining the multi-frequency transmission schedule comprises selecting a subchannel of a transmission frequency based in part on a traffic condition on the subchannel, a priority of the transport block of data and a priority of the transmission frequency by other UEs.

7. The method of claim 1 , wherein determining the multi-frequency transmission schedule comprises selecting a subchannel of a transmission frequency based on whether the transport block of data is to be replicated on more than one subchannel.

8. The method of claim 1 , wherein transmitting the multi-frequency transmission schedule further comprises broadcasting the multi-frequency transmission schedule to at least one other UE in the distributed V2X environment.

9. An apparatus for wireless communication at a user equipment (UE), comprising:
means for determining a number of users on each of one or more subchannels based in part on one or more of: a received demodulation reference signal, a received power during a predetermined time period, and a number of packets successfully decoded;
means for determining by the UE a multi-frequency transmission schedule based at least in part on the determined number of users on the subchannel, wherein determining the multi-frequency transmission schedule comprises assigning the one or more subchannels of multiple transmission frequencies of different wireless technologies to the UE in such a way that results in a reduced number of fragmentations of a transport block of data for communications with at least one other UE in a distributed vehicle-to-everything (V2X) environment;
means for transmitting by the UE the multi-frequency transmission schedule to at least one other UE; and
means for transmitting by the UE the transport block of data based on the multi-frequency transmission schedule.

10. The apparatus of claim 9 , wherein means for determining the multi-frequency transmission schedule further comprises selecting at least one frequency for transmission of at least one transport block of data and the multi-frequency transmission schedule is a semi-persistent schedule or an event-driven schedule.

11. The apparatus of claim 9 , further comprising at least one of:
means for monitoring traffic of the at least one other UE in the distributed V2X environment;
means for updating the multi-frequency transmission schedule based in part on one or more of: an event, a timer and a triggering condition that the number of users on the subchannel exceeds a predetermined threshold; and
means for transmitting the updated multi-frequency transmission schedule to the at least one UE in the distributed V2X environment.

12. The apparatus of claim 9 , wherein means for determining the multi-frequency transmission schedule further comprises selecting a subchannel of a transmission frequency based on one or more propagation characteristics of the transmission frequency, the characteristics comprising a range and a transmission quality of the subchannel of the transmission frequency and wherein determining the multi-frequency transmission schedule further comprises selecting the subchannel of the transmission frequency that meets at least one range requirement for a upper layer message.

13. The apparatus of claim 9 , wherein means for determining the multi-frequency transmission schedule further comprises selecting a subchannels appropriate for a presence of multiple concurrent transmissions and a baseband restriction.

14. The apparatus of claim 9 , wherein means for determining the multi-frequency transmission schedule further comprise selecting a subchannel of a transmission frequency based on at least one of a traffic condition on the transmission frequency, a priority of the transport block of data and a priority of the subchannel of the transmission frequency by other UEs.

15. The apparatus of claim 9 , wherein means for determining the multi-frequency transmission schedule further comprises selecting a subchannel of a transmission frequency based on whether the transport block of data is to be replicated on more than one subchannel.

16. The apparatus of claim 9 , wherein means for transmitting the multi-frequency transmission schedule further comprises broadcasting the multi-frequency transmission schedule to at least one other UE in the distributed V2X environment.

17. An apparatus for wireless communication at a user equipment (UE), comprising:
a transceiver;
a memory; and
at least one processor coupled to at least one of the memory and configured to:
determine a number of users on each of one or more subchannels based in part on one or more of: a received demodulation reference signal, a received power during a predetermined time period, and a number of packets successfully decoded;
determine by the UE a multi-frequency transmission schedule based at least in part on the determined number of users on the subchannel, wherein determining the multi-frequency transmission schedule comprises assigning the one or more subchannels of multiple transmission frequencies of different wireless technologies to the UE in such a way that results in a reduced number of fragmentations of a transport bloc

Assignees

• Qualcomm Inc

Inventors

• Park Cheol Hee
• Santhanam Arvind
• Lu Feng
• Tani Taoufik
• Christol Thomas
• Mu Yunsong
• Wang Yuanbo
• Xiao Gang
• Navalekar Abhijit
• Iyer Ashish Shankar
• Rao Subramanya
• Rajagopalan Srinivasan

Classifications

• H04W72/52 Primary

  based on load · CPC title

• H04W72/543 Primary

  based on requested quality, e.g. QoS · CPC title

• B60W2556/65

  Data transmitted between vehicles · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W4/46

  for vehicle-to-vehicle communication [V2V] · CPC title